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Introduction: Squamous cell carcinoma represents about 90% of malignancies of the mouth and about 38% of the head and neck tumors. The behavior of the cancer is very aggressive, presenting early cervical metastasis and, often contralateral ranging from 0.9 to 36%. Objectives: This study aims to analyze clinical and pathological factors that may influence metastasis of squamous cell carcinoma in cervical lymph nodes and relate this occurrence in the contralateral primary tumor, with disease prognosis and the interference of this type of metastasis in the survival rate of patients with this pathology. Material and Metohds: It was conducted a retrospective study from medical records of patients with Squamous Cell Carcinomas with homolateral lymph node metastasis and contralateral attended at the clinic of Head and neck surgery of Hospital São Vicente de Paulo in Passo Fundo – RS - Brazil, from 2000 to 2008. Results: Analyzing the charts of patients with metastatic and metastatic contralateral side it was observed that patients with initial stage presented a higher survival with statistical significance (p=0,035). Conclusions: The occurrence of metastases in lymph nodes of contralateral position to the primary lesion was not the main fator that influenced the survival of the group. Key words:Squamous cell carcinoma, oral cavity, contralateral, death rate, lymphatic metastasis, prognosis.

IntroduçãoO granuloma central de células gigantes é uma lesão incomum representada por menos de 7% das lesões não neoplásicas dos maxilares. Caracterizado por ser uma lesão benigna, apresenta-se como uma lesão intraóssea formada por tecido fibroso com múltiplos focos de hemorragia, agregados de células gigantes multinucleadas e, ocasionalmente, trabéculas de tecido ósseo 1 . A origem dessa lesão ainda é incerta. Acredita--se que essas lesões podem ter causas locais como traumas e hemorragia intraóssea, ou, ainda, causas sistêmicas que se relacionam a granuloma central de células gigantes, a síndromes como a Neurofibromatose I, à síndrome de Noonan e a distúrbios hormonais como hiperparatireoidismo e, também à gravidez. Acomete principalmente crianças e adultos jovens, sendo mais frequente em mulheres do que em homens e atingindo mais a mandíbula do que a maxila numa proporção de 2:1 2 . As lesões foram classificadas em agressivas e não agressivas, porém, não há diferenças histológi-cas entre essas. A forma não agressiva é mais comum e apresenta crescimento lento, bem delimita- O granuloma central de células gigantes (GCCG) é uma lesão óssea idiopática benigna incomum mais frequentemente encontrada em pacientes jovens do gênero feminino e na maioria dos casos acomete a mandíbula. Seu diagnóstico diferencial inclui outros neoplasmas

The aim of this study was to evaluate the influence of emotional factors in temporomandibular disorders (TMD) in university students. The universe of this study consisted of 696 students of both sexes, from the University of Passo Fundo (UPF)-RS, who signed the free and informed consent term and received the Fonseca's Questionnaire, in order to verify the level of TMD and the Social Readjustment Rating Scale (SRRS), to evaluate the degree of stress level, at the beginning and end of the semester, beginners and graduating students. Data were tabulated and statistically analyzed using the Chi-Square test, with the significance level of 5%. From the total, 489 (70.25%) subjects had some degree of TMD, being the light TMD the most prevalent (309) in all areas of knowledge, with no statistical difference between the studied areas (p= 0.004). There was correlation between TMD and stress-SRRS (r= 0.217). There is a low percentage of individuals who are free from TMD. The correlation between TMD and stress was weak in all studied groups, regardless the area of knowledge, academic period and school grade.

OBJECTIVES:This research evaluated detail registration in peri-implant bone using two different cone beam computer tomography systems and a digital periapical radiograph.METHODS:Three different image acquisition protocols were established for each cone beam computer tomography apparatus, and three clinical situations were simulated in an ex vivo fresh pig mandible: buccal bone defect, peri-implant bone defect, and bone contact. Data were subjected to two analyses: quantitative and qualitative. The quantitative analyses involved a comparison of real specimen measures using a digital caliper in three regions of the preserved buccal bone – A, B and E (control group) – to cone beam computer tomography images obtained with different protocols (kp1, kp2, kp3, ip1, ip2, and ip3). In the qualitative analyses, the ability to register peri-implant details via tomography and digital periapical radiography was verified, as indicated by twelve evaluators. Data were analyzed with ANOVA and Tukey’s test (α=0.05).RESULTS:The quantitative assessment showed means statistically equal to those of the control group under the following conditions: buccal bone defect B and E with kp1 and ip1, peri-implant bone defect E with kp2 and kp3, and bone contact A with kp1, kp2, kp3, and ip2. Qualitatively, only bone contacts were significantly different among the assessments, and the p3 results differed from the p1 and p2 results. The other results were statistically equivalent.CONCLUSIONS:The registration of peri-implant details was influenced by the image acquisition protocol, although metal artifacts were produced in all situations. The evaluators preferred the Kodak 9000 3D cone beam computer tomography in most cases. The evaluators identified buccal bone defects better with cone beam computer tomography and identified peri-implant bone defects better with digital periapical radiography.